CODELOCKS CL255 Code Change Manual

CL255 & CL255 KEY Code Change Guide
The CL255 code chamber consist of 13 buttons from which the code is selected, and a 'C'
button which is used to re-set the chamber after an incorrect entry, and which must always be
used as the first digit of a code. Buttons may only be used once in a code. For example, 1212
is not possible.
A CL255 code, or combination, can be entered in any order or sequence; e.g. 1234 can be
4321 or 1342 or whatever sequence is most convenient to remember. With 13 buttons, a total
of 8,191 different codes are available, any of which can be entered in any sequence.
Most people will set a code in the range of 4 to 7 digits, and the total number of codes in this
range is 5,434.
The lock is factory set with a randomly selected 6 digit code starting with the C button. The
code is not recorded by the factory. The code can be changed as often as required to any other
6 digit code. Every new code must start with the C button. Using the spare tumblers, one red
and one blue, the code length can be changed to 5 or 7 digits. Shorter codes are possible, but
1 or 2 digit codes are not recommended.

Code Change Instructions

1. Take your CL255 lock off the door by unscrewing the 2 bolts in the backplate.
2. Press the C button to reset the chamber and place the lock case on a flat surface with the
buttons down.
3. Remove the 2 red screws and carefully lift off the code chamber plate. Check that all 14
springs are held in place on the plate.
4. Note that the red tipped code tumblers correspond in position to the existing code. The blue
tipped non-code tumblers fill the other positions. The C tumbler is not coloured.
5. Hold the lock in your hand and depress the C button. Keeping the C button depressed use
tweezers to re-position the tumblers to correspond with your new code. The square notches of
ALL tumblers MUST face outwards, with the coloured tips ON TOP: see diagram below. Do
not force the tumblers in.
N.B. Holding the C button depressed whilst removing or replacing the tumblers is
essential to avoid damaging the internal mechanism. Do not attempt to reposition the C
tumbler.